Meta unveiled Muse Spark, its first AI model from the Meta Superintelligence Labs (MSL), which the company calls its most advanced AI yet. The launch comes after Mark Zuckerberg invested billions to set up MSL and acquired Scale AI for over $14 billion, bringing Alexandr Wang on board to lead the lab.

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According to Wang, Muse Spark was built entirely from scratch in just nine months and will now power Meta AI across Instagram, WhatsApp, and Facebook.

Muse Spark is part of Meta’s new Muse AI family, set to replace the older Llama models. Spark is a small, fast model, but “capable enough to reason through complex questions in science, math, and health,” according to Meta.

Meta says Muse Spark can match models like Anthropic’s Claude Opus 4.6 and OpenAI’s GPT 5.4 in benchmarks for multimodal reasoning, health, and agentic AI.

Meta’s Muse Spark AI can understand the world around you, solve complex science and math problems, and pull information from your conversations across Meta apps. According to Alexandr Wang, the AI was “built for the 3 billion people already using [Meta] apps every day.” “We found it competitive w/ other extreme reasoning models such as Gemini Deep Think & GPT Pro,” he added.

Key Features:

• Powers an updated version of Meta AI on the Meta AI app and website

• Expansion planned for Facebook, Instagram, WhatsApp, Messenger, and Meta smart glasses

• New shopping mode offers recommendations based on creators and brands

Muse Spark is closed source, unlike Meta’s open-sourced Llama models, though future versions may be open. Currently available via private API, Wang said bigger models are in development and noted Muse Spark shows strong refusal behavior in high-risk areas compared to other advanced AIs.